learner’s guide · each incorporate proven learning methodology to ensure a positive experience....

LEARNER’SGUIDE

GPS-120 GENERATOR PARALLELING

Professional Development Seminar Series

Standby power systems are increasingly in demand. Commercial, industrial, municipal and healthcare facilities are just a few of the markets that require backup power. Generator paralleling is a crucial part of the process when designing a system.

The ever-changing requirements of the power generation industry, coupled with requests for additional training, has prompted Generac Power Systems to develop this training program.

Titled the Generac Power Systems Professional Development Seminar Series, this program consists of individual training modules that provide both theoretical and practical information. Each module is 90 minutes in length and each incorporate proven learning methodology to ensure a positive experience. These modules are designed to broaden the learner’s understanding of topics such as:

•Current Technologies

•Sizing

•Codes & Standards

•Switching Technologies

•Reliable Design Characteristics

•Paralleling

•Engines and Alternators

•Controls

•Emissions

2

PROFESSIONAL DEVELOPMENT SEMINAR SERIES LEARNER’S GUIDE GPS-120 Generator Paralleling

WELCOME

3

LEARNER’S GUIDE GPS-120 Generator Paralleling PROFESSIONAL DEVELOPMENT SEMINAR SERIES

THE MODULE IN PERSPECTIVE

PURPOSE:This course introduces you to the concept of parallel generator operation. It describes when and why paralleling is used along with special technical considerations including synchronization, load sharing and protection. Integrated versus traditional paralleling implementations are discussed along with their functional and economic considerations. The benefits of an “integrated” parallel system over a single generator application are also discussed.

TIME:

•90 minutes of Classroom Instruction

•30 minutes for Final Assessment

LEARNING OBJECTIVES:Upon completion of this seminar, participants should be able to:

•Describe the concept of creating larger power systems using paralleled generators.

•Describe generator to grid and generator to generator configurations.

• Describe the key differences between the “Traditional” approach to parallel generator systems and today’s “Integrated” approach.

•Describe the electrical requirements needed for proper operation of parallel operation.

•List and describe the functional and economic limitations of “Traditional” generator paralleling.

• List and describe the key functional and economic benefits of the “Integrated” approach to generator paralleling.

• List and describe the key functional and economic benefits of an “Integrated” parallel system over a “Single” generator system.

•Describe different paralleling approaches used by various manufacturers of generator systems.

CONTINUING EDUCATION:Upon successful completion of this seminar, participants will be awarded a certificate of achievement identifying the seminar title, 2.0 PDHs (Professional Development Hours) and 0.2 CEUs (Continuing Education Units).Successful completion of a PDSS seminar requires that the participant have:

1. Attended the complete seminar

2. A minimum score of 80% on the Final Assessment

TRAINING AT A GLANCE

4


TIME LESSON DESCRIPTION

5 minutes Introductions Participants and trainer should become briefly acquainted. The trainer welcomes participants and conducts an opening icebreaker activity.

15 minutes Lesson 1

What is Paralleling?

Conceptual overview of paralleling generators, including generator-to-generator and generator-to grid. The benefits of parallel operation will be discussed along with a look at traditional parallel approaches and their limitations.

10 minutes Lesson 2

What is Required to Parallel?

A discussion of today’s approach to parallel operation. Multi-function digital controllers will be described along with switching integration. A typical sequence of operation will be illustrated.

10 minutes Lesson 3

What is an Integrated Approach to Paralleling?

The generator is a clean power source, but when applied to loads with high harmonic content, the generator voltage may become significantly compromised with harmonic voltage distortion. This lesson discusses various methods used to reduce these harmonic issues.

10 minutes Lesson 4

Integrated vs. Traditional implementations

A comparison of traditional and integrated parallel approaches is discussed with the focus being on the increased reliability of integrated systems.

15 minutes Lesson 5

Integrated Paralleling vs. Single Generator

A comparison between integrated paralleling and single generator use is discussed. Issues of reliability, scalability, cost, installation, maintenance, and serviceability will be evaluated.

10 minutes Lesson 6

Various Manufacturer’s Integrated Approaches

Brief descriptions of the approaches various manufacturers are taking to implement integrated paralleling.

10 minutes Lesson 7

One-lines & Footprint Comparisons

Examples of one-line footprint comparisons with illustrations of integrated, traditional, and single generator systems.

5 minutes Conclusion The trainer will review the objectives of the class and discuss how each objective was accomplished. An evaluation will be given out with which participants can provide feedback about the course. An assessment will also be given to each participant to evaluate the skills and knowledge they received from the course.

5


INTRODUCTION

PROFESSIONAL

DEVELOPMENTDEVELOPMENT

SEMINAR

SERIES WELCOME TOSERIES WELCOME TO GPS-120

Paralleling Concepts & ImplementationsParalleling Concepts & Implementations

Paralleling Concepts& Implementation

PROFESSIONAL


SEMINAR

SERIESSERIES

IntroductionsIntroductions


TIME: 5 minutes

OBJECTIVE: The introduction is an opportunity for the trainer and participants to become familiar with each other. This period will discuss the topics to be covered, capture initial questions and introduce generator paralleling.

NOTES______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

You might be an engineer if…

• You use an RPN calculator• You use an RPN calculator.

• You know the glass is neither half full nor half empty

It's simply twice as big as it needs to be

Professional Development Seminar Series – Paralleling Concepts & Implementation 3

What you will learnUpon completion of this module, participants will be able to describe the basic concepts and implementation approaches to parallel generator operation including both “Traditional” and today’s “Integrated” techniques. They will also be able to identify the advantages of integrated parallel systems over single generator applications Specifically they will be ableintegrated parallel systems over single generator applications. Specifically they will be able to:– Describe the concept of creating larger power systems using paralleled generators.

Describe generator to grid and generator to generator configurations– Describe generator to grid and generator to generator configurations.

– Describe the differences between the “traditional” and “integrated” approach to generator paralleling.

– Describe the electrical requirements needed for proper operation of parallel operation.

– List and describe the functional and economic limitations of “Traditional” generator paralleling.

Li t d d ib th k b fit f th “I t t d” h t t ll li– List and describe the key benefits of the “Integrated” approach to generator paralleling.

– List and describe the key benefits of an “Integrated” parallel system over a “Single” generator.

– Describe different paralleling approaches used by various manufacturers of generator systems.


p g pp y g y

NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

6

XXX


INTRODUCTION

NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Topics Covered & Schedule

• What is paralleling? 15 min

• What is required to parallel? 10 min

• What is an integrated approach to paralleling? 10 min

• Integrated vs. Traditional Implementations 10 min

• Integrated Paralleling vs. Single Generator 15 min

• Various Manufacturer’s Implementations 10 min

• One-lines & Footprint Comparisons 10 min


7


XXXINTRODUCTION

8


PROFESSIONAL


SEMINAR

SERIESWhat is paralleling?

SERIES

G G id (U ili ) P ll liGenerator to Grid (Utility) Paralleling Generator to Generator Paralleling


Paralleling -- Grid

• Electrically connected to the utility grid• Energy management (typically not feasible)gy g ( yp y )

– Emissions (natural gas engines)– Spark Spread (cost feasibility)– Utility barriers (standby charges, ratchets, grid interconnect)


TIME: 15 minutes

OBJECTIVES: Upon completion of this lesson, participants will be able to describe the basic concepts of paralleling generator operation. Specifically, they will be able to:•Describe the differences between generator to grid and generator to generator parallel configurations•Describe the benefits of parallel generator operation•Describe traditional parallel generator systems and their limitations

NOTES______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

1. What is Paralleling?

NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Paralleling – Gen to Gen

• What is a paralleling system?Two or more generators are electrically coupled together using special g y p g g p

equipment to form a larger capacity power source.

52-G252-G1500 kW

+ 500 kW1000 kW

GENERATOR #2

500 kW

GENERATOR #1

500 kW


Paralleling – Grid “Momentary”

• “Make-before-break” transfers– CTTS (less than 100 msec)– Soft-load Closed transition (few seconds)– Synchronize the generator to the utility momentarily– Exercise with load

N t t f– No outage on retransfer

Step 1Utility and Generator in-phase

UtilityGenerator

Step 3 Step 2

Utility and Generator in phase


Load

Step 3 Step 2

9



10




• Why use a paralleling system?– Reliabilityy

Accepted market reliability for single engine is 98-99% Redundant systems offer multiple nines reliable for the critical loads

– N+1 reliability (99.96 to 99.99%)N+2 reliability (99 9992 to 99 9999%)– N+2 reliability (99.9992 to 99.9999%)

– Scaleable Ability to expand as your client’s needs grow Don’t over build – preserve capital

– Serviceable Protect the critical loads while servicing the generator(s) Protect the critical loads while servicing the generator(s)



• Why not use a paralleling system?– Traditional implementations have limitationsTraditional implementations have limitations

Cost (capital, installation, commissioning) Complexity Spacep


NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Lesson 1 - Summary

• Two main types of paralleling operation– Generator-to-GridGenerator to Grid

Used for energy management– Generator-Generator

Formation of larger power sourcesg p Reliable, Redundant, Scaleable, and Serviceable

• Traditional Paralleling Implementation– LimitationsLimitations

Cost (capital, installation, commissioning) Complexity Spacep


11



12

2. What is Required to Parallel?


PROFESSIONAL


SEMINAR

SERIES What is requiredSERIESto parallel generators?

SynchronizingSwitching DeviceSwitching Device

Load SharingProtection


Synchronizing

• Prior to SynchronizingElectronic governor load sharing– Electronic governor -- load sharing

– Electronic voltage regulator w/ paralleling capability– Identical internal alternator winding pitch (i.e. 2/3, 4/5, etc).

Same number of phases– Same number of phases– Same phase to phase voltage– Same phase rotation


TIME: 10 minutes

OBJECTIVES: Upon completion of this lesson, participants will be able to identify and describe the basic requirements for parallel generator operation. Specifically, they will be able to:•Describe the contacts used to connect generator to generator output•Describe the functional differences between Breakers and Contactors•Describe the Synchronizing process•Describe Load Sharing•Describe System Protection.

NOTES______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Contact to Parallel Across

Integrated ImplementationIntegrated Implementation

Traditional Panel Board Method


Traditional Panel Board Method

Synchronizing• Electrically locking two “machines” together

– Voltages matched– Frequencies matched + Slip frequency offset– Phase angles matched

PHASE VOLTAGEMISMATCH

PHASE ANGLEVX

PHASE VOLTAGESMATCHED

VY

PHASE VOLTAGES MATCHEDPHASE ANGLES MATCHED

090º 180º 270º 360º0º

PHASE ANGLEMISMATCH

X

090º 180º 270º 360º0º

PHASE ANGLEMISMATCHED

090º 180º 270º 360º0º

VY

VX VX = VY


SYNCHRONIZED

13



Load Sharing -- Balancing the Triangles

Gen Gen

kVA kVAkVAR

kW

kVA

θkVAR

kW

kVA

θ


Load Sharing -- Protection

(+ kVAR)

“Reverse Power”Normal Operation

Reverse Power

θ

+ kVAR

(+ kW)

+ kVAR- kW + kW

θθθ θθ

- kVAR- kVAR

“Reverse Power”&

“Under-excited”“Under-excited”


NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

14



NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Lesson 2 - Summary

• Basic Paralleling– Synchronizing (align waveforms of the alternators)Synchronizing (align waveforms of the alternators)

Voltage, frequency, phase angle– Contacts to connect generator to generator– Load Sharing (balance and control output power from each unit)Load Sharing (balance and control output power from each unit)– Protection (means to protect system against equipment failure)


Protection

51G 50/51(27)

52-G1 25

51G 50/51(27)

52-G2 25

PT PT

• Synchronizing process– 25 sync check relay

87G

32 40

81O-U 27/59

87G

32 40

81O-U 27/59

CT CT

24 24

46 46

y y

• Real power system (governor & engine)– 32 reverse power

GENERATOR #1

87G

GENERATOR #2

87G

– 81 o/u frequency protection

• Reactive power system (regulation & excitation)– 27 / 59 voltage protection– 24 over excitation & volts/hz

C bli & lt t• Cabling & alternator– 50 / 51 Overcurrent


15



16


3. What is an Integrated Approach to Paralleling?

PROFESSIONAL


SEMINAR

SERIESWhat is an integrated approach

SERIES to paralleling?

Control IntegrationSwitching Integrationg g

Sequence of Operation


Control Integration

Generator Control

Bi F l

PLCLogic

Voltage

Load Share Module (kW)

Bi-Fuel Controller

gRegulator Load Sharing

(kVAR)Integrated Solution

HMI

Speed Go ernor

ProtectiveRelaying

HMI

Governor

Auto Synchronizer

Digital Communications


TIME: 10 minutes

OBJECTIVES: Upon completion of this lesson, participants will be able to describe a modern day “Integrated Approach” to parallel generator operation. Specifically, they will be able to:•List the various functions of a multi-function digital controller•Describe the switching integration•Describe the typical sequence of operation of a parallel system

NOTES______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Sequence of OperationCritical

Transfer SwitchStatus:Normal.

EquipmentEmergency

Distribution Panel EquipmentTransfer Switch

SystemController


Generator 2Generator 1

Paralleling Switch Integration

Distributionor

Transfer Equipment

Single Source ResponsibilitySingle Source ResponsibilitySwitching & Controls


Generator 1 Generator 2

17




Transfer SwitchStatus:Utility failure.

EquipmentEmergency


SystemController




Transfer SwitchStatus:Generators start.

EquipmentEmergency


SystemController



NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

18



NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________


Transfer SwitchStatus:Picking up the critical load in 10 seconds.

EquipmentEmergency


SystemController




Transfer SwitchStatus:First generator at rated output.Energizes the emergency distribution panelEnergizes the emergency distribution panel.

EquipmentEmergency


SystemController



19




Transfer SwitchStatus:Second generator parallels to the system.

EquipmentEmergency


SystemController




Transfer SwitchStatus:Equipment load transfers to the generators.

EquipmentEmergency


SystemController



NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

20



NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________


Transfer SwitchStatus:Generator is restarted.

EquipmentEmergency


SystemController




Transfer SwitchStatus:If a generator is out of service, it separatesfrom the system Non critical load is shedfrom the system. Non-critical load is shed.

EquipmentEmergency


SystemController



21




Transfer SwitchStatus:Generator parallels to the system.

EquipmentEmergency


SystemController




Transfer SwitchStatus:Equipment load is re-energized.

EquipmentEmergency


SystemController



NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

22



NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________


Transfer SwitchStatus:Load is transferred back to utility.

EquipmentEmergency


SystemController




Transfer SwitchStatus:Utility is re-energized.

EquipmentEmergency


SystemController



23




Transfer SwitchStatus:Generators cool down.

EquipmentEmergency


SystemController




Transfer SwitchStatus:Generators disconnect from system.Generators shut downGenerators shut down.

EquipmentEmergency


SystemController



NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

24



25



NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Lesson 3 - Summary

• Integrated Approach to Paralleling– Control Integration (single multi-function digital controller)g ( g g )

Speed Governor Voltage Regulator Load Share Module Synchronizer Synchronizer PLC Digital Communications Protection

– Paralleling Switch Integration Switchgear mounted on generator


26


4. Integrated vs. Traditional implementations

PROFESSIONAL


SEMINAR

SERIESSERIES

Integrated vs. TraditionalImplementations


PROFESSIONAL


SEMINAR

SERIESSERIES

Traditional ImplementationParalleling Concepts

& Implementation

Traditional Implementation(Dead Front Panel Board)

TIME: 15 minutes

OBJECTIVES: Upon completion of this lesson, participants will be able to explain the differences between “Traditional” parallel generator systems and today’s “integrated” approach. Specifically they will be able to:•Describe the differences in control and switchgear configurations•Describe the limitations of the “Traditional” approach to paralleling•List and describe the complexity issues of the “Traditional” approach•List and describe the benefits of the “Integrated” approach to paralleling

NOTES______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Switching Reliability

• Breakers or Contactor– What is the design / intent of a breaker?What is the design / intent of a breaker?– What is the design / intent of an contactor?– Which has mechanics optimized for repetitive switching?– Which has replaceable contacts?Which has replaceable contacts?


Traditional Implementation

• Limitations of dead front panel board approach?– Higher capital costg p– Higher installation cost– Space constraints– Complexityp y– Installation time– Commissioning time


27



Controller Reliability• Limitation of traditional implementation?

– Controller complexity, installation and commissioning time

Engine / Gen ControllerEngine / Gen ControllerMaster Control (PLC)

1 - 2 Controllers 4 - 6 Controllers 4 - 6 Controllers

Governor

Load share module

Synchronizer

Governor

Load share module

Synchronizer

Interface

Protective relay (option)

Regulator

Protective relay(s)

Regulator

Protective relay(s)

52 Bus 52 Gen 1 52 Gen 2


Reliability of Custom/Complex Installs• Custom hardware• Custom software• Limited failure mode analysis• Limited failure mode analysis

– Beta hardware schematic – Beta PLC software

• Multiple suppliersMultiple suppliers• Sequenced by PLC• Hard to troubleshoot• Hard to calibrate• Hard to calibrate

Components from a variety of vendors PLCLoadshare / Synchronizer

Protective RelayVoltage RegulatorGenset Controller


Genset ControllerGovernor (not shown – located on motor)

NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

28



NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Reliability through Integration

• Controller issues are correctedA i d ll di i l h

Voltage

Generator Control


Bi-Fuel Controller

PLCLogic

Voltage

Generator Control


Bi-Fuel Controller

PLCLogic

– An integrated, all digital approach Reduces interconnecting wiring (communications) Proven hardware & software (not one-off designs)

Removes calibration issues (self tuning)Speed

G


(kVAR)

ProtectiveRelaying

Integrated Solution

HMI

Speed G


(kVAR)

ProtectiveRelaying

Integrated Solution

HMI

Removes calibration issues (self tuning) Enhances load balancing stability (inherently stable algorithms) Improves tolerance to electrical noise (no load share lines) Removes system failure modes (load share lines & PLC)

Governor

Auto Synchronizer


Governor

Auto Synchronizer


Removes system failure modes (load share lines & PLC) Maximizes system reliability System remains operational without master control


Reliability of Load Sharing• Traditional load sharing

– Isochronous load sharing– Reactive cross current– Reactive cross current– Struggles with calibration, stability, electrical noise

W NS

OR

PT

52-G1SPEED ADJUST

kW LOADSHARINGMODULE

kW LOADSHARINGMODULEW N

SO

R

PT

52-G2SPEED ADJUST

LOAD SHARINGLINES

AUTOMATIC

kWS

EN

CT

FUEL (SPEED)BIAS SIGNAL

MODULE MODULE

AUTOMATICkW

SE

N

CT

FUEL (SPEED)BIAS SIGNAL

ENGINE

GOVERNOR

AVR

AUTOMATICVOLTAGE

REGULATOR

BIAS SIGNAL

ENGINE

GOVERNOR

AVR

AUTOMATICVOLTAGE

REGULATOR

BIAS SIGNAL


GENERATOR #1 GENERATOR #2

29



Integrated vs Traditional

Integrated Approach• Simple

R li bl

Traditional Approach

RS485

• Reliable• Single Source

GeneratorController

2 wire start

SystemController

IntegratedParallelController

Gov. Controller

Voltage Reg.

kW Share Module

CPU

IntegratedParallel

To EmergencyDistribution

Gov. Controller

GeneratorController

kVAR Share Module

To EmergencyDistribution

ParallelControllerVoltage Reg.

Analog Control LinesDigital Control Lines

Sensing LinesP Li


Power Lines

Lesson 4 - Summary

• Integrated vs. Traditional Parallel Implementations– Integrated Approachg pp

Digital Reduces interconnecting wiring (communications) Simple Reliable Reliable Single Source Responsibility

– Traditional Use of UL891 Dead front switch boards

– High capital cost, high installation cost, space constraints Control Complexity

– Custom hardware/software– Limited failure mode analysis– Installation and commissioning time


NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

30



31


5. Integrated Paralleling vs. Single Generator

PROFESSIONAL


SEMINAR

SERIESIntegrated Paralleling

SERIES versusSingle GeneratorSingle Generator

ReliabilityS l bilitScalability

CostFootprintp

Serviceability


Reliability• Accepted market reliability for single unit

– 98 to 99% (multiple third party references)

• Integrated paralleling adds redundancy– Typical load factors– Minimal load shedding / management

R lt i d d ith t i i t it– Results in redundancy without increasing generator capacity N+1 reliability (99.96 to 99.99%) N+2 reliability (99.9992 to 99.9999%)

Vs.


TIME: 10 minutes

OBJECTIVES: Upon completion of this lesson, participants will be able to describe the benefits of integrated parallel generator systems over single generator systems. Specifically, they will be able to:•Describe the reliability of an integrated system•Describe the scalability of an integrated system•Describe the cost savings in capital, installation and maintenance of an integrated system•List and describe the serviceability features of an integrated parallel system

NOTES______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Scaleable• Start with a single generator• Planned growth• Unanticipated growth• Lower initial investment

B dget / capital constraints• Budget / capital constraints• Protection against uncertainty

Single generator implementations offers no cost effective expansionoffers no cost effective expansion

capabilities – This solution typically uses sizing safety factors to protect against

uncertainty and load growth.


Total Owning Costs• Integrated Paralleling meets Single Generator’s Cost

– Capital cost Optimizing market engine pricing (high volume engines)

– Installation cost Same amps same distance Same amps, same distance Potential for smaller cabling (NEC 800 amp breaker roundup rule) Potential crane reduction (40 ton vs. 80 ton) Pad thickness reduction (6” vs. 10-12”) Pad thickness reduction (6 vs. 10 12 )

– Maintenance cost More manageable fluids Comparable consumables “Ask for PM quotations for both options”


NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

32



NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Serviceable• Single generator implementations

– Limited to no protection while servicing

• Can your critical loads go without protection?– Oil & coolant changes– Belts, hoses, batteries, ,– Load bank connection– Minor repairs– Major repairs

• At what point do you bring in a rental?– Change-over time

• Paralleled implementations provide protection during servicing


Foot Prints• Foot Print Size vs. Location Flexibility

– Foot print examples 1000kW (26.1’ x 8.4’) 2 x 500kW (19.2’ x 13.5’)

1500 kW (33 3’ x 8 4’) 1500 kW (33.3 x 8.4 ) 2 x 750 kW (16.9’ x 16.5’)

– Location flexibility– Location flexibility Various layouts Units can be separated Parking garagesg g g Rooftops


33



Lesson 5 - Summary

• Integrated Paralleling vs. Single Generator– Integrated Parallel Solutions:g

Are More Reliable Allow Expansion Can match the single engine price point Have competitive footprints Have competitive footprints Protect customers critical loads during servicing


NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

34



35


6. Various Manufacturer’s Integrated Approaches

PROFESSIONAL


SEMINAR

SERIESVarious Manufacturer’s

SERIESIntegrated Approaches

CaterpillarGeneracCumminsCummins

Kohler / SDMO


Caterpillar• EPIC (Engine Paralleling Integration Controls Solution)

– Switching via a breaker on the generator

– Multiple control devices EMCP 3.S (load sharing & synchronizing) EMCP 3 3 (generator controllers) EMCP 3.3 (generator controllers) CDVR (voltage regulators)

– Integrationg Communications between Devices

Notes: All manufacturers have a separate engine ECM for EPA tier 3 engines.ECM i l d f tiECM includes governor function.

EMCP 3.S


TIME: 10 minutes

OBJECTIVES: Upon completion of this lesson, participants will be familiar with parallel generator approaches currently being implemented by other manufacturers. Specifically, the following manufacturers will be identified:•Caterpillar•Generac•Cummins•Kohler/SDMO

NOTES______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Generac• Modular Power System (MPS)

– Paralleling switching device mounted on the generator– Single controller per generator

All control functions within single controller Master control using same hardware

Li it d i t ti i i ( ll di it l) Limited interconnecting wiring (all digital) Parallel tests at factory

Generator PLCGenerator PLC

Voltage Regulator

Generator Control


L d Sh i

Bi-Fuel Controller

PLCLogic

Voltage Regulator

Generator Control


L d Sh i

Bi-Fuel Controller

PLCLogic

Speed Governor

g Load Sharing (kVAR)

ProtectiveRelaying

Integrated Solution

HMI

Speed Governor

g Load Sharing (kVAR)

ProtectiveRelaying

Integrated Solution

HMI


Governor

Auto Synchronizer


Governor

Auto Synchronizer


Cummins• PowerCommand Digital Paralleling (PCC3200)

– Typically use dead front panel board switching– Option for Square D electric operated molded case breakers– Single controller per generator

All control functions within single controller (card rack approach) PLC based master control / load management


NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

36



NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Lesson 6 - Summary

• Various Manufacturer’s Integrated Approaches– Manufacturers are taking steps to a more integrated approach

These approaches vary from digital communications with the generator controller and the use of digital load sharing,

to

fully integrated controls and integrated switching.


Kohler• Decision-Maker Paralleling Systems

– Square D electric operated molded case breakers– Single controller per generator

All control functions within single controller (3 board implementation) PLC based master control / load management


37



38


7. One-lines & Footprint Comparisons

PROFESSIONAL


SEMINAR

SERIES One-lines & FootprintsSERIES p(Traditional Approaches vs Integrated Paralleling)

1000 kW Single vs. Twin Pack 2 x 1250 kW vs. 3 x 600 kW

Grid paralleled 1500 kW vs 3 x 500 kW w/ Soft-loadGrid paralleled 1500 kW vs. 3 x 500 kW w/ Soft load1500 kW Single (MV) vs. 2 x Twin Pack (xformer)


1000 kW with Single ATS2 x 500 kW Twin Pack

Foot print: 1000kW Single

Foot print:

Transfer SwitchTransfer Switch

Utility Utility

(Twin Pack)Load LoadLoad

SystemController


Generator 1Generator 1 Generator 2

TIME: 10 minutes

OBJECTIVES: Upon completion of this lesson, participants will be familiar with a variety of one-line footprint comparisons

NOTES______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

1500 kW Soft load3 x 500 kW

Foot print: 19.2’ x 21.8’2 x 750 kW

Foot print: 22.5’ x 14.8’ LoadLoad

Soft Load ATS

Utility

Utility

Distribution

Soft Load ATS


Generator 2 Generator 3Generator 1 Generator 1 Generator 2

1200 kW (N+1)3 x 600 kW

Foot print: 22.5’ x 23.8’2 x 1200 kW

Foot print: 33.3’ x 19.8’

Load

Load

Distribution

Paralleling

Distribution


Generator 2 Generator 3Generator 1 Generator 1 Generator 2


39


40



2400 kW @ 15kV4 x 600 kW

Foot print: 22.5’ x 32.7’2 x 1200 kW

Foot print: 33.3’ x 19.8’

LoadLoad

480 / 15 kV 15 kV

15 kV

Utility

Load

Utility

480 / 15 kVTransformer

15 kVATS

15 kV 15 kV


Generator 2 Generator 3Generator 1 Generator 1 Generator 2Generator 4

NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

NOTES__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Summary

• What is paralleling?• What is required to parallel?• What is required to parallel?• What is an integrated approach to paralleling?

Integrated vs Traditional Implementations• Integrated vs. Traditional Implementations• Integrated Paralleling vs. Single Generator

Vario s Man fact rers Implementations• Various Manufacturers Implementations• One-lines & Footprint Comparisons

Q&A• Q&A


CONCLUSION

41


42


Designing & Specifying Reliable Power Solutions“An Integrated Approach to Paralleling Generators”

WHITE PAPER

INTRODUCTIONParallel power solutions have always offered the standby generation marketplace significant advantages; however, the implementation of these solutions has been limited to mission critical applications and large kilowatt projects. This is largely due to the constraints in implementing traditional paralleling solutions. These constraints include costs, space, issues of single source responsibility, and a significant level of complexity. To access the benefits of parallel generation while removing the cost and complexity limitations, generator manufacturers need to integrate generator paralleling into the genset package.

The first step in evaluating parallel generation options is to acknowledge the benefits gained by placing multiple power sources in parallel. Some of these benefits include increased reliability, expandability, flexibility, service-ability and cost effectiveness.

BENEFITS OF PARALLELED GENERATION

ReliabilityParallel power generation is simply more reliable than single engine generator solutions. With multiple generators on call, redundancy is built-in and reliability is increased because each generator backs up the other. The resulting gains in reliability for the critical loads are significant. For example, if a standby generator has a reliability of 98% an N + 1 configuration has a reliability of 99.96% and an N + 2 configuration has a reliability of five nines. Many would interpret that to mean that redundancy is only gained with the additional cost of under-utilized additional generators -- not so. In many applications, the load requiring the highest degree of reliability is only a percent-age of the total generation capacity. In these situations, parallel generation automatically provides redundancy for the most critical load, provided basic load shedding is implemented in the power system. Load shedding may be implemented through shunt tripping distribution breakers, driving transfer switches to a disconnected position, or interacting with building management systems.

Expandability

Many times when sizing generators, it is difficult to adequately plan for anticipated load growth. If growth projec-tions are too aggressive, precious project capital is expended before it is necessary. If growth projections are too low, the facility may be left without reliable standby power or require expensive generator upgrades. An integrated approach to paralleling generators would allow generators to be added as needed. Wouldn’t it be convenient to simply “plug and play” additional generation modules anytime it’s required? Generation could be scaled to more precisely match load requirements as facilities grow or change. Smaller units of different kilowatt ratings could be combined in any combination to meet a particular load profile. For a growing facility, this expandability has

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two advantages. First, it reduces the initial cost by allowing purchase of a more modest system that is scaled to initial needs and can be expanded as necessary. Second, it eliminates the need to estimate ultimate requirements and purchase a large and very expensive single engine unit suited to that projected need — which may or may not develop as anticipated. With an integrated paralleling system, generation capacity could be managed to match business realities:•Lower initial investment

•Budget / capital constraints

•Controlled growth

•Unanticipated growth

Flexibility Four–pole switches are sometimes, but not always, required for applications involving ground fault protection Utilizing multiple smaller generators instead of a single large unit solution offers greater application flexibility. This can be a significant advantage in meeting many site-specific logistical constraints. Multiple smaller genera-tors offer greater weight distribution making roof-top installations more feasible. Smaller generators are also shorter and lower, providing flexibility in applications with height or depth constraints. In addition, the genera-tors do not need to be located side by side or even together, thus providing significant installation flexibility for retrofit projects.

Serviceability Multiple generator solutions also provide flexibility during service operations. With multiple generators avail-able, unit(s) can be taken out of service for repair or scheduled maintenance without complete loss of a site’s standby power. Remaining in-service units can still serve critical site loads. Though catastrophic failures of standby generators are not common, multiple generator solutions significantly mitigate the effects of such an event. The inherent redundancy of the system ensures backup power even during equipment failure and the capi-tal cost to replace a smaller unit is a fraction of the large, single generator expense.

Cost Effectiveness An ancillary benefit of using multiple smaller gensets is derived from the engine classification. Smaller genera-tors use high volume, mass-produced over-the-road truck engines. These prime movers tend to be of extremely high quality and very reliable due to the level of tooling and plant automation utilized in their manufacture. This same automation along with market pressures and economies of scale make this engine class the lowest cost per kW for prime movers. When these high value prime movers are combined with internally integrated paralleling technology, paralleled generation systems can compete dollar for dollar against monolithic single engine solu-tions. In addition to capital cost, this engine class tends to have less expensive maintenance and replacement parts and the engines are more readily serviceable by on-road diesel technicians.

LIMITATIONS OF TRADITIONAL PARALLELING

Cost Even though paralleled generation has all the previously identified benefits, its application has been significantly limited. Implementations were limited to mission critical applications in which cost was a secondary concern to power reliability or applications requiring power in excess of 2 MW (historically the largest cost effective single engine solution). Historically, paralleled power generation was accomplished through utilizing third party vendors that integrated UL891 dead front panel boards into generator paralleling switchgear. Though effective, this approach has its limitations. Cost is the most notable drawback. The capital cost for low voltage traditional generator switchgear is typically $20,000 to $25,000 per section. To parallel two generators (which typically

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requires one section for each generator and a master control section) would cost $60,000 to $75,000. That is just the start of the entire project’s expense.

Space The switchgear needs dedicated floor space inside the building. Plan for each section to be 36” wide by 48” deep and 90” tall. Also plan for a minimum of 3’ in front and 3’ behind the switchgear cabinets. The switchgear lineup needs to be located in place and bus work may need to be reconnected.

Integration Issues Plan on a week for the entire installation process. Once installed, plan on another week for startup and commis-sioning. This process requires the generator and switchgear technicians to be on-site and rarely goes smoothly. The only exception to this is for equipment that has been previously tested at the factory as an entire system (gen-erators and switchgear). It soon becomes obvious to anyone running the numbers that the traditional approach to paralleling generators can only be justified for a limited number of high-end applications.

TRADITIONAL PARALLELING CONTROL COMPLEXITY Additionally, this approach is less than optimal given the complexity of the control system. Each generator in the system typically includes four to six micro-controllers. These controllers are a combination of analog and digital technology from various manufacturers that are hardwired together into an amalgamated system. Thus a two gen-erator paralleling system would require nine to fourteen controllers once the master control section is included in the controller count. It becomes apparent that these systems are more complex than they initially appear.

Speed Control Each generator in the system incorporates an electronic governor function. For a mechanically injected engine the governor is typically a third party controller from companies like Woodward Governor Company, Barber Cole-man, Governors of America, etc. For electronically injected engines, this function is internal to the engine man-agement controller supplied by the engine manufacturer. This governor function normally controls engine speed and, as a result, generator frequency in what is called isochronous speed control. Basically, a speed governor is a simple PID (Proportional / Integrated / Derivative) controller that compares engine speed to a reference and then ramps the engine fuel rack open or closed.

This works fine for a single engine generator. However, when multiple generators are paralleled together the con-trol parameter (engine speed) is locked into the speed of the other generators in the system. This creates a prob-lem. The engine with a slightly lower speed set point will integrate its fuel setting closed and reverse power. The engine with a slightly higher speed set point will integrate its fuel setting open till it is carrying the entire system load or is at full throttle. The generators don’t inherently share load. It’s like a bicycle for two in which only one person is pushing power into the pedals.

Load Balancing Enter the second controller. Each generator incorporates a loadshare controller that constantly tweaks the gover-nor’s speed reference for its engine. For this system to work, the loadshare controllers are interconnected with a loadshare line that shares information about expected load levels. Through constant speed reference changes, this system does balance load between the generators even though from a control loop standpoint it is inherently un-stable. The weakness of this traditional approach is that it requires everything to work perfectly and unfortunately it tends to be sensitive to electrical noise. It is kind of like trying to balance a marble on the outside of a bowl by tipping the bowl left and right. You can do it if you’re quick enough, but don’t get distracted.

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Synchronizing The third controller is an auto synchronizer. This controller matches the sine wave of the generator with the sine wave of the generator bus and issues the command to close the breaker tying them together. This process tends to be very straightforward and easily accomplished. For some manufacturers, loadshare controllers and synchroniz-ers are integrated into a single device.

Voltage Regulation The fourth controller for each generator is the voltage regulator. The regulator is typically supplied by the alterna-tor manufacturer or from independent third party controller companies like Basler Electric. This regulator func-tion normally controls alternator voltage. Similar to the speed governor, the regulator is a simple PID controller that compares alternator voltage to a reference and then ramps the alternator excitation up and down. This works fine for a single generator; however, when multiple generators are paralleled together the control parameter (volt-age) is locked into the voltage of the other generators in the system. This presents another problem. The alterna-tor with a slightly lower voltage set point will integrate its excitation setting to zero. The alternator with a slightly higher voltage set point will integrate its excitation setting open until it is carrying the entire system’s kVAR load. The generators don’t inherently share kVAR. To correct this situation the regulators are interconnected in a system called reactive cross current. This system tweaks the voltage regulator references using inputs from current trans-formers that are all connected together in series. Again, the weakness of this traditional approach is that it requires everything to work perfectly and unfortunately it tends to be sensitive to electrical noise.

Genset Control Protection The fifth and sixth controllers are typically the genset controller and a protective relay. The genset controller is typically manufactured by the genset OEM and monitors various engine and alternator parameters and provides alarming per NFPA 110 requirements. The protective relay typically performs sync check, voltage and frequency, and reverse power functions. Companies like Beckwidth, Basler, Schweitzer, etc. typically manufacture protective relays. In addition to these controllers, the master control section includes a PLC from Allen Bradley, Modicon, Siemens, etc. This PLC is custom programmed for each project to coordinate relay logic between all the control-lers in the system and provide basic communication and control for the system. The switchgear integrator pro-grams the PLC.

Manual Control As you can see, the traditional approach to paralleling generators does have its challenges. To enhance the reli-ability of these systems, switchgear is often wired with a manual mode of operation for when things go wrong. In this mode, the load share lines and cross current lines are opened and the control loops are typically placed in an inherently more stable control mode (droop). It should be noted that even in manual control mode, the genera-tor still requires four mission critical controllers to function: governor, regulator, genset controller, and protective relay. Naturally, the question is — why so many controllers? Why not design the system with a single controller per generator?

THE INTEGRATED APPROACH TO PARALLELING

Integrated Digital Control The first step in creating an integrated approach to generator paralleling is to utilize one digital controller per generator to control all generator functions: speed governing, voltage regulation, genset alarm and monitoring, synchronizing, load sharing, and protection. This consolidation of functions significantly changes the issues sur-rounding parallel generation. What was a complex system becomes a simple “plug and play” module. No more hardwiring multiple controllers together. No more difficult calibration processes. No more inherently unstable control loops. No more pulling I/O points back to the master PLC just to secure basic supervisor monitoring capa-bilities.

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This approach of using a single digital controller per generator significantly enhances system performance. Inher-ently unstable load sharing methods are replaced with stable control loops. Synchronizing processes are greatly enhanced by directly interacting with frequency control functions. Troubleshooting becomes a simple process of monitoring inputs and outputs using a laptop computer. Repairs that took hours or days are reduced to minutes using an on-site spare controller and a simple plug and play approach. Supervisory control and monitoring is also made easy by simply passing all information digitally.

Beyond system performance, reliability is significantly enhanced. What was a maze of analog and digital con-trollers from different manufacturers hardwired together with complex interconnecting wiring is replaced with simplicity. Just the pure reduction in component count mathematically drives reliability through the roof. Fur-thermore, since all control functions are contained on a single CPU, this circuit board can be hardened from the effects of environmental degradation, mechanical stresses, and electrical interference.

The Integrated Paralleling Switch The second step in creating an integrated approach to generator paralleling is to integrate the paralleling switch function into the generator connection box (figure 1), thus removing the cost and space of external switchgear. Once a generator becomes synchronized, the generator controller issues a close command to a paralleling switch that connects the unit to the generator bus. Historically this switch is a motor operated breaker located in a large metal cabinet, and connected to a bus bar. With an integrated paralleling system, the paralleling switch is a high cycle rated contactor specifically designed for switching power circuits, versus a breaker that is designed as an overcurrent protective device. The paralleling switch is mounted on and wired directly to the generator, resulting in a higher degree of system integration. The paralleling switch is then cabled to a common point that is typically a generator distribution panel (see figure 2). This cabling replaces the functionality of the generator bus bar inside traditional switchgear. From the generator distribution panel, various automatic transfer switches are fed. For single transfer switch applications, the wiring from the paralleling switches would be terminated directly to the transfer switch generator terminals. The end result of mounting the paralleling switch on the generator is a solu-tion that features reduced complexity and cost while maintaining the benefits of a multiple unit system.

FIGURE 1EXAMPLE OF A PARALLELING SWITCH MOUNTED ON A GENERATOR

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SYSTEM MASTER CONTROL Traditional switchgear utilizes a PLC to coordinate the operation of every generator and ATS in the emergency power system. An integrated paralleling system also needs a system controller for coordination. These functions include starting and stopping the generators, priority loading, load shedding and data collection for supervisory control by building management systems. A significant difference offered by an integrated approach is that most all communication to the system controller is digital versus the hardwiring required in many traditional systems. Also, the system controller does not have to perform relay logic to sequence multiple other controllers.

Operationally, each ATS monitors utility voltage and signals the system controller upon loss of utility supply. The system controller in turn communicates digitally to the integrated controller on each generator to control unit start-ing and stopping, along with sequencing for paralleling to the generator bus.

Operating Sequence To understand the sequence of operation, let’s look at an automatic start sequence initiated by a utility failure. For this example, Figure 2 shows an emergency power system with two generators and two automatic transfer switches (ATS’s). The generators are connected to the system controller via a single RS485 data line. A two-wire start line is run from each ATS similar to any single engine standby solution, except the connection is made to the system controller. In this illustration the critical load ATS is configured to pick up load within ten seconds after a power outage. Upon utility failure, the transfer switches sense loss of utility power and provide a two-wire start signal to the system controller that provides a start command to all the generators in the system. The generators start and accelerate to rated speed. The system controller gives the first generator that reaches rated voltage and frequency permission to close onto the dead generator bus. Upon sensing the energized generator bus, the critical load ATS will transfer onto generator power. At this point, with one generator on the bus, the second ATS for equipment load is prevented from transferring onto the generator bus by a priority loading feature built into the system control-ler, thus preventing an overload of the first unit onto the generator bus. With the generator bus now energized, the remaining generator must synchronize to this power waveform before it can switch onto the bus for parallel opera-tion. The integrated generator controller controls this process. As additional generators parallel to the bus, the system controller compares available generation capacity to expected load. Load is added in order of priority only when sufficient capacity is available. Another function of the system controller is load shedding. If a generator fails to start or fails during operation, load equal to the lost generator capacity remains offline or is removed from the system. Load shedding can be performed within the ATS or a shunt trip circuit breaker within the facility’s distribution system.

FIGURE 2TYPICAL CONFIGURATION OF AN INTEGRATED PARALLELING SYSTEM

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SUMMARY The benefits of parallel generation are widely accepted in the marketplace; however, the implementation of these solutions has been limited. As mentioned, this is largely due to the constraints in implementing traditional parallel-ing solutions. These constraints include cost, space, issues of single source responsibility, and a significant level of complexity. To meet the market’s expectations for price and performance, generator suppliers must migrate to an integrated digital control philosophy and relocate the paralleling switch function onto the generator. Through these steps, paralleled power solutions can be designed to compete cost effectively against single engine/generator price points while maintaining parallel generation benefits

Generac Power Systems www.generac.com 1–888–GENERAC

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NOTES

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ONLINE FINAL ASSESSMENT AND CERTIFICATE

REGISTRATION AND LOGIN PROCEDURE

Online Final Assessment Final assessments are available for each PDSS session. These assessments are Web-based and can be accessed using Generac’s online learning system “The Learning Center” (http:// learning.generac.com). PDSS participants are required to obtain a score of at least 80% to pass an assessment. Each online assessment also contains a training survey. The survey provides each participant an opportunity to rate various components of the learning experience along with information relative to business development. Instructions for how to register and log in to this system, take the final assessment and print a certificate, are described in the Registering in “The Learning Center” section below. Continuing Education Upon successful completion of a seminar, participants will be awarded 2.0 PDHs (Professional Development Hours) and 0.2 CEUs (Continuing Education Units). Successful completion of a seminar requires that the participant have:

• Attended the complete seminar • Received a minimum score of 80% on the Final Assessment

Certificate of Accomplishment Participants who successfully complete the seminar and receive a passing score on the online final assessment are entitled to a “Certificate of Accomplishment.” Certificates are available for printing directly from the participant’s account screen on Generac’s online training system “The Learning Center”. Instructions for how to register and log in to this system, take the final assessment and print a certificate, are described beginning in the following section. Registering in “The Learning Center” To gain access to “The Learning Center”, you are required to register and set up a user account. During your account setup you will create a Username and Password. Your username and password can then be used to log in on subsequent visits. The following pages will aid you in the registration process along with the Final Assessment, Survey and Certificate procedures. To begin the registration process, open your computer’s browser and enter http:// learning.generac.com. This should take you to “The Learning Center” home page. This page is displayed at the top of the next page. From this point you can follow illustrated steps.

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Begin by entering http://learning.generac.com in your computer’s browser. The screen below will be displayed. Click on the “register here” link to begin the registration process.

On this screen you will select “Guest” from the drop down box and click the “Next” button.

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In this next screen enter Access Code 9595 and click the “Next” button. Please keep this code private.

This screen confirms the correct access code entry. Click the “Yes” button to proceed.

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The next screen contains the “User Registration” form. Fill in the required boxes, and then click the “Register” button.

The next screen confirms your registration. Click the “Continue” button to proceed.

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The next screen displays the “Course Catalog.” Click on the “Professional Development Seminar Series” link.

This next screen lists all currently available Final Assessments. Click on the Final Assessment that is tied to the course name and number you completed.

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The next screen is the “Enrollment” screen for the Final Assessment that you selected. Click the “Enroll” link to proceed.

This screen confirms your enrollment. Click the “My Account” button to proceed.

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This is your “My Account” screen. Note that the Final Assessment you selected is displayed under the “Enrollment” tab. Click the “GO” button to proceed.

This screen lists the two parts to the Final Assessment. You must take the “Graded” Assessment first, then the Training Survey.

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In the next screen an “Assessment Code” is required before you can continue. The code for GPS-120 Paralleling Concepts and Implementation is gen683. Enter the code in the box and click the “Submit” button to continue.

You will now proceed through a ten question assessment. Please read the warnings below.

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Please follow the instructions on this screen. You must wait for your assessment data to be saved. Do not close this window or click the ‘Back’ of ‘Refresh’ buttons on your browser.

This screen confirms that your data was saved. Click on the link shown here to proceed.

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This screen will be displayed after your assessment data is saved. Note that in this example the assessment was passed with a score of 100% and the Survey is unlocked and ready to launch.

Upon launching the Survey, this screen will be displayed. Select the Generac dealer who conducted the seminar you attended.

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After completing the survey you will be prompted to return to the assessment menu. Your response data will be saved as before, and you will see the screen below. Click the “My Account” button to continue.

Your “My Account” screen will look similar to the one shown here. Click the “Print” link to print your certificate.

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Generac Power Systems, Inc.S45 W29290 Hwy. 59Waukesha, WI 53189

1-888-GENERAC (1-888-436-3722)

gene rac .com

Part No. GPS1205000 rev. D / Printed in USA 02/02/12©2012 Generac Power Systems, Inc. All rights reserved.Specifications are subject to change without noticeNo reproduction allowed in any form without prior written consent from Generac Power Systems, Inc.

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